Apache LoadBalanced, Ldirector.

From time to time, NODE Ldirector started shooting
connection to a Web server, not the more closed
connections, leaving the WebServer over 20,000 Connections
tcp on port 80 in timewait. So I return to normality
after that restart the Web Server

And even then my apache continued with the same problem. Thought
it was problem with the connections that were getting in
timewait. This time there are no more connection and even then he
not respond to web requests.

I try to "TOP" and not answered. I believe it may be some
something related to memory.

What do you think? Have you ever seen the "TOP" stop
answer the charge?